CN101318254A - Thick steel plate buried arc welding method for high-strength bridge - Google Patents
Thick steel plate buried arc welding method for high-strength bridge Download PDFInfo
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- CN101318254A CN101318254A CNA2008100482494A CN200810048249A CN101318254A CN 101318254 A CN101318254 A CN 101318254A CN A2008100482494 A CNA2008100482494 A CN A2008100482494A CN 200810048249 A CN200810048249 A CN 200810048249A CN 101318254 A CN101318254 A CN 101318254A
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Abstract
The invention relates to a submerged arc welding butt welding technique for high intensity bridge steels, which is used for solving problems at present that in the submerged arc welding butt welding of making large span bridge structures by the bridge steels with low alloy and high intensity, the bridge steels need to be heat treated and back-gouged after being welded. The measure is as following: the method of the invention includes that the bridge steels with the tensile strength of 570MPa to 650MPa and the thickness of 36 to 60mm are used; the matched welding material meet the requirements that the tensile strength of welding wires is 600MPa, the diameter Phi of the welding wires is 5.0mm, the welding flux is SJ105Q; a submerged arc welding groove adopts a double-sided V shape asymmetrical groove, the groove angle is 60 degrees, the blunted edge is 6mm; the flame before the welding is preheated to 80 DEG C to 100 DEG C; the welding parameter includes that the welding current is 680A to 700A, the welding voltage is 29V to 30V, the welding speed is 22m/h to 23m/h, the welding line energy is 32kJ/cm to 35kJ/cm, the baking system of the welding flux is 350 DEG C multiplied by 1h; the submerged arc welding adopts the multi-layer and multi-channel continuous welding, and the interlayer temperature is controlled to be 100 DEG C to 160 DEG C. The submerged arc welding butt welding technique for the high intensity bridge steels is simple in procedure and low in energy consumption without the heat treating and the back gouging after being welded.
Description
Technical field
The present invention relates to a kind of high-strength bridge steel submerged-arc welding process method, be particularly useful for R
m570～650MPa MPa rank low-alloy high-strength bridge steel is made the submerged-arc welding butt joint welding technique of long-span bridge girder construction.
Background technology
Along with the global design of bridge progressively to high-strength, stride greatly, heavy duty, the development of high speed aspect.Because the bridge Welding Structure develops to high parameter, maximization direction day by day, this has just proposed more and more higher requirement to the performance of steel for welded structures, not only good comprehensive mechanical properties to be arranged, and good process industrial art performance to be arranged, as the High-speed Railway Bridges of design load maximum in the world---Nanjing is won completely and is closed the bridge construction of going into full operation, and it indicates the implementation phase that China's article one Beijing-Shanghai High-Speed Railway bridge engineering having entered.It is one 6 line railroad bridge that the Changjiang river, pass bridge is won in Nanjing completely, and wherein 2 lines are that high speed main track, 2 lines are I level trunk railway, and 2 lines are subway in addition, and the design road speed is 300Km/h.It is 336 * 2 continuous steel truss arch structure bridges, three main trusses that main bridge adopts span, and the High-speed Railway Bridges that Guan Qiao will become present state interior span maximum is won in the Nanjing after building up completely.The quality of weldability is one of leading indicator of estimating the steel serviceability.Weldability, welding material and corresponding welding procedure are three fundamentals of soldering low alloy structural steel, three's interwoveness.Therefore, as untimely weldability and supporting welding material and the welding procedure problem that solves the Longspan Bridge steel grade effectively, will directly hinder applying of Bridges in Our Country steel and new steel grade.Accelerate to carry out the coupling and the Study of Welding Technology of the at a high speed big bridge steel welding material in large span Nanjing, Bridges in Our Country is applied great economic benefit and social benefit with steel in long-span bridge girder construction manufacturing technology.
Adopt at present existing submerged arc welding material and welding procedure coupling, deposited metal ballistic work and actual joint toughness far can not satisfy the solder technology requirement that modern Longspan Bridge is made, and especially compare with the base material of high tenacity, and its toughness index is too wide in the gap.Under the situation of large-line energy and multilayer welding, the joint low-temperature flexibility obviously descends, especially welding line joint three districts-40 ℃ A
KVBallistic work can not satisfy Longspan Bridge manufacturing technology index request of new generation.
Summary of the invention
The objective of the invention is to propose take to weld the welding technique that the back chipping process was not heat-treated, be need not to carry out yet to preceding 80～100 ℃ of preheatings, postweldings in a kind of solution submerged-arc welding process and the matching materials welding large span high-strength bridge steel thick plate structure manufacture process.
Realize the above-mentioned purpose technology contents:
A kind of high-strength bridge steel slab buried arc welding method that is used for, its step:
(1) adopting tensile strength is that 570～650MPa bridge steel, thickness are 36～60mm; The welding material of coupling: welding wire tensile strength 600MPa, gage of wire Φ 5.0mm, solder flux are SJ105Q;
(2) the submerged-arc welding groove adopts the asymmetric groove of two-sided V-type, and bevel angle is 60 °, and root face is 6mm;
(3) adopt flame to be preheating to 80～100 ℃ before the weldering;
(4) welding condition: welding current 680～700A, weldingvoltage 29～30V, speed of welding 22～23m/h, weld heat input 32～35kJ/cm, solder flux baking system is 350 ℃ * 1h;
(5) multilayer multiple tracks continuous sequence is adopted in submerged-arc welding, and interlayer temperature is controlled at 100～160 ℃.
It is: require the base material mechanical property of welding to be: yield strength R
EL: 420～560MPa, tensile strength R
m: 570～650MPa, percentage elongation: A18～27% ,-40 ℃ of ballistic work A
KV: 120～270J.
It is: in steel plate thickness is the scope of 36～60mm, adopt different thicknesss of slab or identical thickness of slab combination banjo fixing butt jointing submerged-arc welding welding.
It is: the welding wire that adopts is a patented product, its patent No. be ZL001's 14334.4 " high-strength and high-toughness submerged-arc welding electrode ", its chemical constituent and percentage by weight are: C 0.05～0.10, Si≤0.10, Mn 1.60～2.0, Ni 0.30～0.50, Ti0.08～0.15, Mo 0.20～0.50, P≤0.015, S≤0.010, all the other are iron and unavoidable impurities.
The present invention compared with prior art has following advantage:
(1) the present invention satisfied that China strides greatly, heavy duty, at a high speed, the crucial submerged arc welding manufacturing process of high strength, high tenacity new generation of bridge structural steel, submerged-arc welding joint tensile strength, joint ballistic work reach higher level, and joint has higher impact flexibility deposit and the rich degree of safety.
(2) adopt welding technique of the present invention, submerged-arc welding joint overheated zone is mainly bainite structure, and weld metal is mainly tiny acicular ferrite structure, thereby makes weld seam have good low-temperature impact toughness and cracking resistance.
(3) adopt welding technique of the present invention to realize preceding 80～100 ℃ of welding procedures that preheating, postwelding are not heat-treated of high-strength bridge steel thick plate structure manufacture process weldering, need not to carry out the back chipping process, promptly operation is simple, energy consumption is low.
Weld seam still has higher ballistic work when (4) adopting multilayer multiple tracks continuous sequence technology, is applicable to that factory's large-span bridge steel manufacturing applies.
The specific embodiment
Embodiment 1:
Base material: be the steel plate that the mechanical controlled rolling technology of heat (TMCP)+tempering is produced, its thickness is that the mechanical property of 36mm steel plate is: yield strength R
EL: 525MPa, tensile strength R
m: 600MPa, percentage elongation A:26.5% ,-40 ℃ of ballistic work A
KV: 270J, test plate (panel) are of a size of 600mm * 400mm * 36mm; Its thickness is that the mechanical property of 44mm steel plate is: yield strength R
EL: 515MPa, tensile strength R
m: 590MPa, percentage elongation A:25% ,-40 ℃ of ballistic work A
KV: 265J, test plate (panel) are of a size of 600mm * 400mm * 44mm; The submerged-arc welding groove adopts the asymmetric groove of two-sided V-type, and bevel angle is 60 °, root face 6mm.
The welding material coupling:
Welding wire: its chemical constituent and percentage by weight are: C 0.06, Si 0.05, Mn 1.85, Ni 0.31, Ti 0.09, Mo 0.30, P≤0.011, S 0.008, all the other are iron and unavoidable impurities.Gage of wire is Φ 5.0mm, and welds with sintered flux SJ105Q coupling.After testing, the mechanical property of its deposited metal is R
El=555MPa, R
m=640MPa, A=27%, Z=70%, A
KV(40 ℃)=114J.
Adopt flame to be preheating to 80 ℃ the steel plate of 36mm+44mm thickness of slab; Dock submerged arc welding; Welding condition is: welding current 680～700A, weldingvoltage 29～30V, speed of welding 22.5～23m/h, weld heat input 32～35kJ/cm; Solder flux baking system is 350 ℃ * 1h; The submerged-arc welding banjo fixing butt jointing adopts multilayer multiple tracks continuous sequence, and interlayer temperature is controlled at 100～130 ℃.
Postwelding test plate (panel) weld seam is the I level through 100% ultrasonic examination.
Adopt the high-strength bridge steel of above-mentioned welding method welding, through its joint mechanical property being detected joint tensile strength R
m=575MPa, fracture position: base material, (180 ° of lateral bending d=3a) is qualified in the joint clod wash, full weld seam tensile yield strength R
El=585MPa, tensile strength R
m=660MPa, percentage elongation A=22%, weld seam ballistic work A
KV(40 ℃)=200J, heat affected area (1mm) A
KV(40 ℃)=255J.
Embodiment 2:
Base material: be the steel plate that the mechanical controlled rolling technology of heat (TMCP)+tempering is produced, slab combination 50mm+50mm; Its mechanical property is: yield strength R
EL: 515MPa, tensile strength R
m: 590MPa, percentage elongation A:22% ,-40 ℃ of ballistic work A
KV: 265J.Test plate (panel) is of a size of 600mm * 400mm * 50mm; The submerged-arc welding groove adopts the asymmetric groove of two-sided V-type, and bevel angle is 60 °, root face 6mm.
The welding material coupling:
Welding wire: its chemical constituent and percentage by weight are: C 0.08, Si 0.06, Mn 2.0, Ni 0.50, Ti 0.10, Mo 0.40, P 0.015, S≤0.006, all the other are iron and unavoidable impurities.Gage of wire is Φ 5.0mm, and welds with sintered flux SJ105Q coupling.After testing, the mechanical property of its deposited metal is R
El=555MPa, R
m=640MPa, A=27%, Z=70%, A
KV(40 ℃)=114J.
Adopt flame to be preheating to 90 ℃ the steel plate of 50mm+50mm thickness of slab; Dock submerged arc welding; Welding condition is: it is 680～690A that multi-pass welding connects electric current, weldingvoltage 29～30V, and speed of welding 22～23m/h, weld heat input 32～35kJ/cm, solder flux baking system is 350 ℃ * 1h; The submerged-arc welding banjo fixing butt jointing adopts multilayer multiple tracks continuous sequence, and interlayer temperature is controlled at 120～140 ℃.
Postwelding test plate (panel) weld seam is the I level through 100% ultrasonic examination.
Adopt said welding method welded high-strength bridge steel banjo fixing butt jointing mechanical property, joint tensile strength R
mReach 580MPa, fracture position: base material, (180 ° of lateral bending d=3a) is qualified in the joint clod wash, full weld seam tensile yield strength R
El=525MPa, tensile strength R
m=600MPa, percentage elongation A=26%, weld seam ballistic work A
KV(40 ℃)=118J, heat affected area (1mm) A
KV(40 ℃)=241J.
Embodiment 3:
Base material: be the steel plate that the mechanical controlled rolling technology of heat (TMCP)+tempering is produced, slab combination 60mm+60mm; Its mechanical property is: yield strength R
EL: 495MPa, tensile strength R
m: 620MPa, percentage elongation A:24.5% ,-40 ℃ of ballistic work A
KV: 257J.Test plate (panel) is of a size of 600mm * 400mm * 50mm; The submerged-arc welding groove adopts the asymmetric groove of two-sided V-type, and bevel angle is 60 °, root face 6mm.
The welding material coupling:
Welding wire: its chemical constituent and percentage by weight are: C 0.10, Si 0.10, Mn 1.60～2.0, Ni 0.35, Ti 0.13, Mo0.20, P 0.012, S 0.009, all the other are iron and unavoidable impurities.Gage of wire is Φ 5.0mm, and welds with sintered flux SJ105Q coupling.After testing, the mechanical property of its deposited metal is R
El=555MPa, R
m=640MPa, A=27%, Z=70%, A
KV(40 ℃)=114J.
Adopt flame to be preheating to 100 ℃ the steel plate of 60mm+60mm thickness of slab; Dock submerged arc welding; Welding condition is: multi-pass welding meets electric current average out to 690A, welding average voltage 29.5V, and speed of welding 22.5m/h, weld heat input 33kJ/cm, solder flux baking system is 350 ℃ * 1h; The submerged-arc welding banjo fixing butt jointing adopts multilayer multiple tracks continuous sequence, and interlayer temperature is controlled at 130～150 ℃.
Postwelding test plate (panel) weld seam is the I level through 100% ultrasonic examination.
Adopt said welding method welded high-strength bridge steel banjo fixing butt jointing mechanical property, joint tensile strength R
m=595MPa, fracture position: base material, (180 ° of lateral bending d=3a) is qualified in the joint clod wash, full weld seam tensile yield strength R
El=530MPa, tensile strength R
m=605MPa, percentage elongation A=24%, weld seam ballistic work A
KV(40 ℃)=186J, heat affected area (1mm) A
KV(40 ℃)=270J.
Claims (4)
1. one kind is used for high-strength bridge steel slab buried arc welding method, its step:
(1) adopting tensile strength is that 570～650MPa bridge steel, thickness are 36～60mm; The welding material of coupling: welding wire tensile strength 600MPa, gage of wire Φ 5.0mm, solder flux are SJ105Q;
(2) the submerged-arc welding groove adopts the asymmetric groove of two-sided V-type, and bevel angle is 60 °, and root face is 6mm;
(3) adopt flame to be preheating to 80～100 ℃ before the weldering;
(4) welding condition: welding current 680～700A, weldingvoltage 29～30V, speed of welding 22～23m/h, weld heat input 32～35kJ/cm, solder flux baking system is 350 ℃ * 1h;
(5) multilayer multiple tracks continuous sequence is adopted in submerged-arc welding, and interlayer temperature is controlled at 100～160 ℃.
2. a kind of high-strength bridge steel slab buried arc welding method that is used for as claimed in claim 1 is characterized in that: require the base material mechanical property of welding to be: yield strength R
EL: 420～560MPa, tensile strength R
m: 570～650MPa, percentage elongation: A18～27% ,-40 ℃ of ballistic work A
KV: 120～270J.
3. a kind of high-strength bridge steel slab buried arc welding method that is used for as claimed in claim 1 or 2 is characterized in that: in steel plate thickness is the scope of 36～60mm, adopt different thicknesss of slab or identical thickness of slab combination banjo fixing butt jointing submerged-arc welding welding.
4. a kind of high-strength bridge steel slab buried arc welding method that is used for as claimed in claim 1, it is characterized in that: the welding wire that adopts is a patented product, its patent No. be ZL001's 14334.4 " high-strength and high-toughness submerged-arc welding electrode ", its chemical constituent and percentage by weight are: C 0.05～0.10, Si≤0.10, Mn 1.60～2.0, Ni 0.30～0.50, Ti 0.08～0.15, Mo0.20～0.50, P≤0.015, S≤0.010, all the other are iron and unavoidable impurities.
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| CN2008100482494A CN101318254B (en) | 2008-07-01 | 2008-07-01 | Thick steel plate buried arc welding method for high-strength bridge |
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|---|---|---|---|
| CN2008100482494A CN101318254B (en) | 2008-07-01 | 2008-07-01 | Thick steel plate buried arc welding method for high-strength bridge |
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| CN101318254B CN101318254B (en) | 2011-04-20 |
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| CN101862887A (en) * | 2010-04-28 | 2010-10-20 | 南京钢铁股份有限公司 | Method of submerged-arc welding of thick sheet S355NL for low-temperature wind tower |
| CN101879645A (en) * | 2010-07-06 | 2010-11-10 | 蓬莱巨涛海洋工程重工有限公司 | Marine engineering large thick steel plate submerged arc welding process method in low-temperature environment |
| CN102107312A (en) * | 2011-01-13 | 2011-06-29 | 安徽跨宇钢结构网架工程有限公司 | Butt welding and T-shaped welding construction method for thick steel plate in normal temperature state |
| CN102152076A (en) * | 2011-03-23 | 2011-08-17 | 河北宇鹏重工管道装备制造有限公司 | Process method for manufacturing hot-pressing thick-wall tee joint by performing automatic submerged arc welding on X80-grade steel plate |
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| CN101774068B (en) * | 2009-12-25 | 2012-01-11 | 鲁西工业装备有限公司 | Submerged-arc welding process of stainless steel composite steel plate |
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| CN102861974A (en) * | 2012-09-21 | 2013-01-09 | 武汉钢铁(集团)公司 | Angle joint submerged arc welding method of bridge steel combinations with different strengths and plate thicknesses |
| CN103934552A (en) * | 2014-04-08 | 2014-07-23 | 武汉钢铁(集团)公司 | Submerged-arc butt welding method for engineering structure steel with Rm larger than or equal to 650 MPa |
| CN104625342A (en) * | 2014-12-19 | 2015-05-20 | 山东钢铁股份有限公司 | Welded joint welding technology for high-performance bridge steel angle with yield strength being 500 MPa |
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| CN101658984B (en) * | 2009-09-15 | 2011-12-14 | 武汉科技大学 | High-toughness gas protective welding wire for large linear energy welding high-strength steel plate |
| CN101774068B (en) * | 2009-12-25 | 2012-01-11 | 鲁西工业装备有限公司 | Submerged-arc welding process of stainless steel composite steel plate |
| CN101862887B (en) * | 2010-04-28 | 2012-05-02 | 南京钢铁股份有限公司 | Method of submerged-arc welding of thick sheet S355NL for low-temperature wind tower |
| CN101862887A (en) * | 2010-04-28 | 2010-10-20 | 南京钢铁股份有限公司 | Method of submerged-arc welding of thick sheet S355NL for low-temperature wind tower |
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| CN109014513A (en) * | 2017-06-12 | 2018-12-18 | 鞍钢股份有限公司 | High-strength extra-thick steel plate double-wire submerged arc welding method for high heat input welding |
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